assume cs:codesg, ds:datasg

datasg segment
    db '1. file         '
    db '2. edit         '
    db '3. search       '
    db '4. view         '
    db '5. opetions     '
    db '6. help         '
datasg ends

codesg segment
start:
    mov ax, datasg
    mov ds, ax

    mov cx, 6
    mov si, 3
    mov di, 16
    mov bx, 0

s:
    mov al, ds:[bx+si]
    and al, 11011111B
    mov ds:[bx+si], al
    add si, di
    loop s

    mov ax, 4c00H
    int 21H
codesg ends

end start